Can You Grow Brazil Nuts in the UK?
Brazil nuts come from the Bertholletia excelsa tree, a giant of the Amazon rainforest. The short answer is no – you cannot grow Brazil nuts outdoors in the UK because the climate is far too cold and lacks the specialised bees needed for pollination. You could attempt to grow a tree indoors or in a heated greenhouse, but producing actual nuts is extremely unlikely and would take many years.
What exactly are Brazil nuts and where do they come from?
Brazil nuts are large seeds from the Bertholletia excelsa tree. These trees can grow up to 50 metres tall and live for over 500 years. They are native to the Amazon rainforest in countries like Brazil, Bolivia, and Peru.
The tree needs a very specific environment to grow and fruit. It requires:
- High humidity (80% or more)
- Temperatures between 24°C and 27°C year-round
- No frost – ever
- Large areas of undisturbed forest
- A particular type of orchid bee to pollinate the flowers
Without these conditions, the tree will not produce nuts. The nuts themselves are actually seeds that grow inside a hard, coconut-like fruit weighing up to 2 kg.
Can the Brazil nut tree survive in the UK climate?
No, a Brazil nut tree cannot survive outdoors anywhere in the UK. The main issue is cold temperatures. Even mild winters in southern England dip below 0°C, which would kill a young tree. Mature trees are more tolerant, but they still cannot handle frost or sustained cold below 10°C.
Britain lacks the high humidity of the Amazon. Average humidity in the UK is around 65-80%, but the Amazon sits at 80-90% year-round. The tree’s roots and leaves are not adapted to dry air or sudden temperature drops.
Another big problem is pollination. Brazil nut flowers are complex and can only be pollinated by female orchid bees (Euglossini). These bees do not live in the UK. Without them, flowers fall off and no nuts form. Even if you hand-pollinate, it’s nearly impossible to achieve the same result.
Is it possible to grow Brazil nuts in a greenhouse or indoors?
It is barely possible to keep a Brazil nut tree alive in a very large, climate-controlled greenhouse. However, growing it to the point where it produces nuts is a massive challenge.
Here is what you would need:
- A very tall greenhouse – the tree can grow 2 metres per year once established. After 10 years it could be 10-15 metres high.
- Constant warmth (25°C all year) and high humidity
- Artificial lighting in winter
- Hand pollination using a small brush – but it rarely works
- 10 to 20 years before the tree even flowers
Most indoor attempts fail because the tree becomes too big and the environment is never quite right. Even arboretums and botanic gardens struggle to keep them healthy. The Royal Botanic Gardens at Kew has tried, but their specimen does not produce nuts.
If you want to try growing a tropical tree as a curiosity, you could start with a heated propagator for germination. Here is one option for keeping seeds warm and humid: Heated propagator for controlled germination.
What are the main challenges of growing Brazil nuts in the UK?
Let’s break down the biggest obstacles in a simple table.
| Challenge | What the tree needs | Why the UK fails |
|---|---|---|
| Temperature | 24–27°C, never below 10°C | UK winters drop below 0°C; even in a greenhouse, heating costs are huge |
| Humidity | 80% or higher | UK average is 65-80%; dry central heating makes it worse |
| Space | Large territory – tree can be 50m tall | UK gardens and greenhouses are far too small after a few years |
| Pollination | Orchid bees that collect perfume from orchids | Orchid bees do not live in the UK; hand pollination rarely works |
| Time | 10–20 years to first flowers | Most growers give up before the tree matures |
| Seed availability | Fresh seeds must be planted within weeks | Imported Brazil nuts are often roasted or dried – they will not sprout |
As you can see, every single requirement is hard to meet in Britain. Even if you manage to grow a leafy tree, getting actual nuts is a different story.
What other tropical nut trees can you grow in the UK?
If you want to grow nuts in the UK, stick with trees that naturally suit the climate. Some good options include:
- Hazelnuts (Corylus avellana) – easy, native, produces nuts in 3–5 years
- Walnuts (Juglans regia) – grow well in southern England, need space
- Sweet chestnuts (Castanea sativa) – do well in warmer areas
- Almonds (Prunus dulcis) – with a sheltered spot and mild winters, some varieties fruit
- Pecans – possible in very warm microclimates, but tricky
For something more tropical-looking, you could try pomegranate or figs – they need winter protection but are far easier than Brazil nuts.
Can you buy Brazil nut trees or seeds to try?
You will have a very hard time finding a live Brazil nut tree for sale in the UK. Even fresh seeds are almost impossible to get legally because of import restrictions – Brazil nuts are a protected species under CITES (Convention on International Trade in Endangered Species) when exported in large quantities.
If you buy Brazil nuts from a supermarket, they are almost always roasted or heat-treated to kill bacteria. These will not germinate. Fresh seeds can sometimes be ordered from specialist tropical seed suppliers abroad, but they rarely survive shipping.
If you want to try germinating tropical seeds, you can use a humidity dome and a heat mat. Here is a simple kit for starting warm-climate seeds: Seed starting kit with humidity dome.
Even with the right equipment, be prepared for disappointment. Brazil nut seeds have a very short viability – they must be planted within weeks of falling from the tree.
Is it worth trying to grow Brazil nuts in the UK for the experience?
If you are looking for a fun novelty plant for a heated indoor spot, you could try germinating a Brazil nut seed and see how long it survives. As a houseplant, it might last a year or two before outgrowing the space.
But do not expect nuts. The time, money, and effort needed to create the right conditions are huge. A heated greenhouse big enough for a mature tree would cost thousands of pounds to build and run. Even then, the pollination problem remains unsolved.
Instead, consider growing something more rewarding, like a dwarf avocado or a potted citrus tree. They are easier and give you fruit within reach.
Where can I find Brazil nuts to eat if I can't grow them?
Since you cannot grow Brazil nuts in the UK, the best option is to buy them. Look for raw, unsalted Brazil nuts from a reputable seller. They are rich in selenium and make a healthy snack.
You can find bulk Brazil nuts online: Raw Brazil nuts in bulk.
To summarise: Can you grow Brazil nuts in the UK? No, not outdoors. Can you keep a tree alive indoors? Maybe, for a while. Can you harvest nuts? Almost certainly not. Save your time and enjoy them from the shop instead.